Luminescent Centers of Eu 2+ in BaMgAl 10O 17 Phosphor

Abstract

Two kinds of luminescent centers are observed in BaMgAl 10O 17:Eu 2+ phosphor. Influence of flux on luminescence of Eu 2+ in the phosphor is discussed in detail. There exists Eu 2+ (F −) center (a luminescent center with 277 nm excitation band and 386 nm emission band) due to the substitution of F − ions for O 2− ions. Effective energy transfer from Eu 2+ (F −) to Eu 2+ (O 2−) (a luminescent center with 334 nm excitation band and 450 nm emission band) is observed. The quenching concentration of Eu 2+ in BaMgAl 10O 17 is raised by 0.20 mole per mole host due to forming of new luminescent center Eu 2+ (F −).